java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.trace.refinement.strategy SIFA_TAIPAN --sifa.abstract.domain CompoundDomain --rcfgbuilder.size.of.a.code.block LoopFreeBlock --sifa.call.summarizer TopInputCallSummarizer --sifa.fluid SizeLimitFluid --sifa.simplification.technique SIMPLIFY_QUICK -i ../../../trunk/examples/svcomp/eca-rers2012/Problem15_label33.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:54:37,478 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 01:54:37,480 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 01:54:37,495 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-10-15 01:54:37,506 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 01:54:37,507 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 01:54:37,508 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 01:54:37,509 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 01:54:37,509 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 01:54:37,510 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 01:54:37,512 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 01:54:37,514 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 01:54:37,515 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 01:54:37,516 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 01:54:37,517 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 01:54:37,518 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 01:54:37,520 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 01:54:37,527 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:54:37,528 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:54:37,529 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:54:37,530 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-15 01:54:37,544 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:54:37,545 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:54:37,546 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:54:37,546 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:54:37,548 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:54:37,548 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:54:37,548 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:54:37,548 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:54:37,548 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:54:37,549 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:54:37,549 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:54:37,549 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:54:37,550 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:54:37,550 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:54:37,550 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:54:37,551 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:54:37,551 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:54:37,551 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:54:37,552 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:54:37,552 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:54:37,552 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:54:37,552 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:54:37,552 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:54:37,553 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:54:37,553 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:54:37,553 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:54:37,554 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:54:37,554 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:54:37,554 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> SIFA_TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> CompoundDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> LoopFreeBlock Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Call Summarizer -> TopInputCallSummarizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Fluid -> SizeLimitFluid Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Simplification Technique -> SIMPLIFY_QUICK [2019-10-15 01:54:37,824 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:54:37,837 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:54:37,840 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:54:37,841 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:54:37,842 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:54:37,843 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem15_label33.c [2019-10-15 01:54:37,902 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dbdc37a52/1dcb2cb7932540ac9c24f720f933b1cd/FLAGdc5fbbfbc [2019-10-15 01:54:38,528 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:54:38,529 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem15_label33.c [2019-10-15 01:54:38,552 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dbdc37a52/1dcb2cb7932540ac9c24f720f933b1cd/FLAGdc5fbbfbc [2019-10-15 01:54:38,678 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dbdc37a52/1dcb2cb7932540ac9c24f720f933b1cd [2019-10-15 01:54:38,689 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:54:38,691 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:54:38,692 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:54:38,692 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:54:38,696 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:54:38,697 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:54:38" (1/1) ... [2019-10-15 01:54:38,699 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@641eaed7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:54:38, skipping insertion in model container [2019-10-15 01:54:38,700 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:54:38" (1/1) ... [2019-10-15 01:54:38,707 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:54:38,788 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:54:39,700 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:54:39,707 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:54:39,981 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:54:40,007 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:54:40,008 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:54:40 WrapperNode [2019-10-15 01:54:40,008 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:54:40,010 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:54:40,010 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:54:40,011 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:54:40,028 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:54:40" (1/1) ... [2019-10-15 01:54:40,029 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:54:40" (1/1) ... [2019-10-15 01:54:40,080 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:54:40" (1/1) ... [2019-10-15 01:54:40,081 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:54:40" (1/1) ... [2019-10-15 01:54:40,143 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:54:40" (1/1) ... [2019-10-15 01:54:40,159 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:54:40" (1/1) ... [2019-10-15 01:54:40,181 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:54:40" (1/1) ... [2019-10-15 01:54:40,207 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:54:40,207 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:54:40,207 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:54:40,208 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:54:40,209 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:54:40" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:54:40,279 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:54:40,280 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:54:40,280 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-15 01:54:40,280 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-15 01:54:40,280 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:54:40,281 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-15 01:54:40,281 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-15 01:54:40,281 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:54:40,281 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 01:54:40,282 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 01:54:40,282 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:54:40,283 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:54:40,283 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:54:51,788 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:54:51,788 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 01:54:51,790 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:54:51 BoogieIcfgContainer [2019-10-15 01:54:51,790 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:54:51,791 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:54:51,792 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:54:51,795 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:54:51,796 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:54:38" (1/3) ... [2019-10-15 01:54:51,797 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ae8be6a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:54:51, skipping insertion in model container [2019-10-15 01:54:51,797 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:54:40" (2/3) ... [2019-10-15 01:54:51,797 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ae8be6a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:54:51, skipping insertion in model container [2019-10-15 01:54:51,798 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:54:51" (3/3) ... [2019-10-15 01:54:51,799 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem15_label33.c [2019-10-15 01:54:51,812 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:54:51,821 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:54:51,833 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:54:51,861 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:54:51,861 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:54:51,861 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:54:51,861 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:54:51,861 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:54:51,862 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:54:51,862 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:54:51,862 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:54:51,888 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states. [2019-10-15 01:54:51,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-10-15 01:54:51,894 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:54:51,896 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:54:51,897 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:54:51,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:54:51,902 INFO L82 PathProgramCache]: Analyzing trace with hash 648044909, now seen corresponding path program 1 times [2019-10-15 01:54:51,909 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:54:51,910 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999435323] [2019-10-15 01:54:51,910 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:54:51,910 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:54:51,910 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:54:52,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:54:52,227 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:54:52,228 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999435323] [2019-10-15 01:54:52,229 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:54:52,229 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 01:54:52,230 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738375933] [2019-10-15 01:54:52,234 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:54:52,234 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:54:52,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:54:52,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 01:54:52,251 INFO L87 Difference]: Start difference. First operand 244 states. Second operand 4 states. [2019-10-15 01:54:56,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:54:56,376 INFO L93 Difference]: Finished difference Result 953 states and 1852 transitions. [2019-10-15 01:54:56,377 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 01:54:56,378 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2019-10-15 01:54:56,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:54:56,415 INFO L225 Difference]: With dead ends: 953 [2019-10-15 01:54:56,415 INFO L226 Difference]: Without dead ends: 702 [2019-10-15 01:54:56,429 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 01:54:56,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 702 states. [2019-10-15 01:54:56,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 702 to 469. [2019-10-15 01:54:56,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 469 states. [2019-10-15 01:54:56,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 824 transitions. [2019-10-15 01:54:56,572 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 824 transitions. Word has length 11 [2019-10-15 01:54:56,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:54:56,573 INFO L462 AbstractCegarLoop]: Abstraction has 469 states and 824 transitions. [2019-10-15 01:54:56,573 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:54:56,574 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 824 transitions. [2019-10-15 01:54:56,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-10-15 01:54:56,577 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:54:56,577 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:54:56,578 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:54:56,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:54:56,579 INFO L82 PathProgramCache]: Analyzing trace with hash -1940132124, now seen corresponding path program 1 times [2019-10-15 01:54:56,579 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:54:56,580 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034687493] [2019-10-15 01:54:56,580 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:54:56,580 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:54:56,580 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:54:56,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:54:56,773 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:54:56,774 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034687493] [2019-10-15 01:54:56,776 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:54:56,777 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 01:54:56,777 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882478022] [2019-10-15 01:54:56,778 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 01:54:56,779 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:54:56,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 01:54:56,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-15 01:54:56,781 INFO L87 Difference]: Start difference. First operand 469 states and 824 transitions. Second operand 6 states. [2019-10-15 01:55:06,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:55:06,015 INFO L93 Difference]: Finished difference Result 1682 states and 3010 transitions. [2019-10-15 01:55:06,017 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-15 01:55:06,018 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 23 [2019-10-15 01:55:06,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:55:06,032 INFO L225 Difference]: With dead ends: 1682 [2019-10-15 01:55:06,032 INFO L226 Difference]: Without dead ends: 1218 [2019-10-15 01:55:06,038 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2019-10-15 01:55:06,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1218 states. [2019-10-15 01:55:06,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1218 to 1134. [2019-10-15 01:55:06,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1134 states. [2019-10-15 01:55:06,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1134 states to 1134 states and 1933 transitions. [2019-10-15 01:55:06,146 INFO L78 Accepts]: Start accepts. Automaton has 1134 states and 1933 transitions. Word has length 23 [2019-10-15 01:55:06,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:55:06,147 INFO L462 AbstractCegarLoop]: Abstraction has 1134 states and 1933 transitions. [2019-10-15 01:55:06,147 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 01:55:06,148 INFO L276 IsEmpty]: Start isEmpty. Operand 1134 states and 1933 transitions. [2019-10-15 01:55:06,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-10-15 01:55:06,150 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:55:06,150 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:55:06,150 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:55:06,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:55:06,151 INFO L82 PathProgramCache]: Analyzing trace with hash -1661108783, now seen corresponding path program 1 times [2019-10-15 01:55:06,152 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:55:06,152 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043401079] [2019-10-15 01:55:06,153 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:55:06,154 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:55:06,154 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:55:06,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:55:06,246 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:55:06,246 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043401079] [2019-10-15 01:55:06,247 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:55:06,247 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-15 01:55:06,247 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813263895] [2019-10-15 01:55:06,248 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 01:55:06,248 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:55:06,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 01:55:06,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-15 01:55:06,249 INFO L87 Difference]: Start difference. First operand 1134 states and 1933 transitions. Second operand 5 states. [2019-10-15 01:55:10,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:55:10,179 INFO L93 Difference]: Finished difference Result 3211 states and 5719 transitions. [2019-10-15 01:55:10,180 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-15 01:55:10,180 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 24 [2019-10-15 01:55:10,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:55:10,198 INFO L225 Difference]: With dead ends: 3211 [2019-10-15 01:55:10,206 INFO L226 Difference]: Without dead ends: 2082 [2019-10-15 01:55:10,211 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-10-15 01:55:10,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2082 states. [2019-10-15 01:55:10,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2082 to 1749. [2019-10-15 01:55:10,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1749 states. [2019-10-15 01:55:10,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1749 states to 1749 states and 2680 transitions. [2019-10-15 01:55:10,289 INFO L78 Accepts]: Start accepts. Automaton has 1749 states and 2680 transitions. Word has length 24 [2019-10-15 01:55:10,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:55:10,290 INFO L462 AbstractCegarLoop]: Abstraction has 1749 states and 2680 transitions. [2019-10-15 01:55:10,290 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 01:55:10,290 INFO L276 IsEmpty]: Start isEmpty. Operand 1749 states and 2680 transitions. [2019-10-15 01:55:10,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-10-15 01:55:10,292 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:55:10,293 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:55:10,293 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:55:10,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:55:10,293 INFO L82 PathProgramCache]: Analyzing trace with hash -1399877695, now seen corresponding path program 1 times [2019-10-15 01:55:10,294 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:55:10,294 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000131184] [2019-10-15 01:55:10,294 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:55:10,294 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:55:10,294 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:55:10,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:55:10,451 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:55:10,452 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000131184] [2019-10-15 01:55:10,452 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:55:10,452 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 01:55:10,453 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058130779] [2019-10-15 01:55:10,453 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:55:10,454 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:55:10,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:55:10,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 01:55:10,454 INFO L87 Difference]: Start difference. First operand 1749 states and 2680 transitions. Second operand 4 states. [2019-10-15 01:55:16,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:55:16,733 INFO L93 Difference]: Finished difference Result 6620 states and 10691 transitions. [2019-10-15 01:55:16,739 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 01:55:16,739 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 32 [2019-10-15 01:55:16,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:55:16,772 INFO L225 Difference]: With dead ends: 6620 [2019-10-15 01:55:16,773 INFO L226 Difference]: Without dead ends: 4876 [2019-10-15 01:55:16,781 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 01:55:16,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4876 states. [2019-10-15 01:55:16,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4876 to 4290. [2019-10-15 01:55:16,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4290 states. [2019-10-15 01:55:16,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4290 states to 4290 states and 6680 transitions. [2019-10-15 01:55:16,930 INFO L78 Accepts]: Start accepts. Automaton has 4290 states and 6680 transitions. Word has length 32 [2019-10-15 01:55:16,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:55:16,932 INFO L462 AbstractCegarLoop]: Abstraction has 4290 states and 6680 transitions. [2019-10-15 01:55:16,932 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:55:16,932 INFO L276 IsEmpty]: Start isEmpty. Operand 4290 states and 6680 transitions. [2019-10-15 01:55:16,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-10-15 01:55:16,946 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:55:16,947 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:55:16,947 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:55:16,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:55:16,947 INFO L82 PathProgramCache]: Analyzing trace with hash 2144963697, now seen corresponding path program 1 times [2019-10-15 01:55:16,948 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:55:16,948 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138467112] [2019-10-15 01:55:16,948 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:55:16,949 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:55:16,949 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:55:17,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:55:17,115 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-15 01:55:17,116 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138467112] [2019-10-15 01:55:17,116 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:55:17,116 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 01:55:17,116 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787428201] [2019-10-15 01:55:17,117 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:55:17,117 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:55:17,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:55:17,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 01:55:17,118 INFO L87 Difference]: Start difference. First operand 4290 states and 6680 transitions. Second operand 4 states.